Technical Specifications
IS 4985: 2000 (Extract)
Wall thickness for working pressure classes (mm)
Outside diameter (mm)
Tolerance on outside diameter (mm)
Class 1 2.5 kgf/cm2
Class 2 4 kgf/cm2
Class 3 6 kgf/cm2
Class 5 10 kgf/cm2
Min
Max
20
+0.3
1.1
1.5
25
1.4
1.8
32
2.2
40
2.7
50
1.7
2.1
2.8
3.3
63
1.9
3.5
4.1
75
2.6
3.1
4.2
4.9
90
1.3
3.7
5
5.7
110
+0.4
1.6
2
2.5
3
4.3
6.1
7
125
+0.5
2.9
3.4
6
6.9
8
140
2.4
3.2
3.8
4.8
5.5
7.7
8.7
160
2.3
5.4
6.2
8.8
9.9
180
+0.6
11.1
200
4.6
5.3
6.8
11
12.3
225
+0.7
3.9
5.2
7.6
8.6
12.4
13.9
250
+0.8
3.6
6.5
8.5
9.6
13.8
15.4
280
+0.9
6.4
7.3
9.5
10.7
17.2
315
+1
7.2
8.2
12
17.3
19.3
355
+1.1
5.1
5.9
8.1
9.4
19.6
22.6
400
+1.2
5.8
6.7
9.1
10.5
13.5
15.6
22
25.3
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